Lang Stereopad comparisons
Reviewed by Fiona Rowe

The aim of this study was to compare the effectiveness of the Lang Stereopad in detecting and measuring stereopsis in a population with normal visual parameters. The Lang Stereopad was compared directly to the Frisby, TNO and Lang II stereotests in a population of health university and hospital staff. Of 105 recruited subjects, data was analysed for 98. Mean age was 33.5 years (SD 14) with 39 males and 59 females. Ceiling effects were noted with the Lang II with mean stereoacuity of 200” (SD0). Mean stereoacuity was 103.93” (SD 109.71) for TNO, 55.71” (SD 38.79) for Frisby and 162.24” (SD 173.06) for the Lang Stereopad. The Lang Stereopad was easy to administer and did not require added test glasses. Stereoacuity values from the Lang Stereopad did not agree with those from other stereotests and thus warrants further research in clinical populations to investigate the extent of these differences.

Comparative analysis of the Lang Stereopad in a non-clinic population.
Rowe FJ, Hepworth LR, Howard C, et al.
STRABISMUS
2019;27(3):182-90.